This work addresses the smart environments theme and presents a framework for decision making based on information from an important Brazilian city, which have technologies used in the preparation, monitoring and management of traffic emergencies. The technological resources that the city has are exposed, as well as statistical data showing a panorama of traffic in recent years. The technologies analyzed in the context of the framework are useful in decisions-making, thus creating an environment capable of acquiring knowledge about all those who are involved in it (its inhabitants and everything that surrounds them) and applying the knowledge, adapting it to the monitoring, in the emergency preparedness. Also, simulations of scenarios that could be constructed were presented if new components were inserted in the environment or if there were specific data for a purpose. Such simulations guide future efforts to improve the environment and to improve activities relevant to the day-to-day traffic of cities.